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Hydrotalcite-loaded iron phthalocyanine visible light-fenton catalyst, preparation method and application thereof

A technology of hydrotalcite and iron phthalocyanine, which is applied in the field of hydrotalcite-supported iron phthalocyanine visible light-Fenton catalyst and its preparation, can solve the problems of catalyst loss, increased operating cost, narrow pH value range, etc. The effect of improving catalytic efficiency and wide application range

Active Publication Date: 2016-02-24
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these photo-Fenton methods still have some deficiencies in practical application: (1) the pH range of their adaptation is narrow
The reaction usually needs to be carried out in an acidic medium with a pH of 2.0 to 4.0, so the pH value of the wastewater needs to be adjusted in advance, thereby increasing the operating cost of water treatment; (2) in the system of homogeneous photo-Fenton degradation of organic pollutants, due to The existence of a large amount of iron ions causes the iron ions to be difficult to separate from the reaction medium after the reaction is over, which not only causes the loss of the catalyst, but also may cause secondary pollution; (3) the current photo-Fenton method mostly uses ultraviolet light as the light source, which will Greatly increase operating costs

Method used

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  • Hydrotalcite-loaded iron phthalocyanine visible light-fenton catalyst, preparation method and application thereof
  • Hydrotalcite-loaded iron phthalocyanine visible light-fenton catalyst, preparation method and application thereof
  • Hydrotalcite-loaded iron phthalocyanine visible light-fenton catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Preparation of magnesium aluminum nitrate-type hydrotalcite precursor by single drop method

[0049] Configure the mixed solution of magnesium nitrate and aluminum nitrate with boiled deionized water, the total metal cation concentration of the obtained mixed salt solution is Mg+Al=0.6mol / L, Mg:Al (molar ratio)=2:1, and it is configured into a 150mL Add the mixed salt solution into a three-necked round-bottomed flask, and then inject nitrogen to prevent CO in the air 2 interference. Place the three-necked round-bottomed flask on a magnetic stirrer, stir at a constant temperature of 35°C, slowly add 1.0mol / L sodium hydroxide solution dropwise into the flask, the pH at the end point is 10.00, and stir for 1 hour after titration to obtain a suspension Aged at 60°C for 18h.

[0050] 2) Preparation of tetrasulfonic acid phthalocyanine iron

[0051] Mix 28.25g tetrasulfonic acid phthalic acid solution, 22.97g urea, 0.276g boric acid, 5.0g ferric ammonium sulfate hexahyd...

Embodiment 2

[0065] The preparation of hydrotalcite-supported iron tetrasulfonic acid phthalocyanine visible light-Fenton catalyst is the same as that in Example 1.

[0066] Hydrotalcite Supported Tetrasulfonic Phthalocyanine Iron Visible Light-Fenton Catalyst Synergistic H 2 o 2 Reagents degrade dye wastewater; put 800mL of methylene blue dye wastewater with a concentration of 10mg / L in the reactor, adjust the pH value of the system to 5, add 0.32g of hydrotalcite-loaded tetrasulfonic acid phthalocyanine iron visible light-Fenton catalyst, in the dark Under the condition of adsorption equilibrium, add the aqueous hydrogen peroxide solution whose system concentration is 8mmol / L. Place it under a 400W xenon lamp for 3 hours, measure the absorbance of the system and the change of TOC, and obtain the degradation effect of the dye wastewater: the decolorization rate is 99.91%, and the mineralization rate is 58.63%.

Embodiment 3

[0068] The magnesium aluminum nitrate type hydrotalcite precursor is prepared by the double drop method; the mixed solution of magnesium nitrate and aluminum nitrate is prepared with boiled deionized water, and the total metal cation concentration of the obtained mixed salt solution is Mg+Al=0.6mol / L, Mg: Al (molar ratio) = 2:1, configured as 150mL of mixed salt solution and 1.0mol / L sodium hydroxide solution into the three-necked round bottom flask at the same time, and nitrogen gas was introduced to prevent CO in the air. 2 For interference, place the three-necked round-bottom flask on a magnetic stirrer, stir at a constant temperature of 35°C, keep the pH of the solution at 10.00 during the dropwise addition, stir for 1 hour after titration, and age the resulting suspension at 60°C for 18 hours.

[0069] The preparation of hydrotalcite-supported iron tetrasulfonic acid phthalocyanine visible light-Fenton catalyst is the same as that in Example 1.

[0070] Hydrotalcite Suppo...

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Abstract

The invention discloses a hydrotalcite-loaded iron phthalocyanine visible light-fenton catalyst, a preparation method and an application thereof. The visible light-fenton catalyst is formed by magnesium aluminium nitrate hydrotalcite and its loaded tetra-sulfonic iron phthalocyanine, through the adsorption effect of the magnesium aluminium nitrate hydrotalcite on tetra-sulfonic iron phthalocyanine and ion exchange effect between the magnesium aluminium nitrate hydrotalcite and tetra-sulfonic iron phthalocyanine, the tetra-sulfonic iron phthalocyanine is loaded on an interlayer and surface of the magnesium aluminium nitrate hydrotalcite; and the catalyst is used for visible light-fenton degraded dye waste water and has good degradation effect. The application of the visible light-fenton catalyst widens a reaction pH value scope of Fenton-like compounds, reduces an usage amount of a H2O2 reagent, enhances the degradation efficiency of the Fenton-like compounds on the dye waste water in a visible light zone, and greatly reduces the processing cost of the dye waste water, cost is low, environment is friendly, and the visible light-fenton catalyst has industrial application prospect.

Description

technical field [0001] The invention relates to a hydrotalcite-supported iron phthalocyanine visible light-Fenton catalyst and its preparation method and application, in particular to a method for hydrotalcite-supported iron phthalocyanine visible light-Fenton catalyst combined with a similar-Fenton degradation dye wastewater. Background technique [0002] The photo-Fenton method is an advanced chemical oxidation method, which uses the hydroxyl radicals generated by the system to degrade the dyes into small molecular organic compounds that are easy to biochemically degrade, and even completely mineralize them into carbon dioxide and water. There are many reports on photo-Fenton degradation of organic matter. Recently reported literature, such as related articles published in "AppliedCatalysisB:Environmental", "Waterresearch", "ChemicalEngineeringJournal": (1) M, Gündüz G, S, et al. Characterization and catalytic activity of CuFeZSM-5 catalysts for oxidative degradation of...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J31/26C02F1/72C02F1/30C02F103/30
CPCY02W10/37
Inventor 刘云唐宵宵毛妍彦
Owner XIANGTAN UNIV
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